Nicki Minaj Goes Green For Charity, Shows Butt Cheek [Photo]

Nicki Minaj stepped out in a green and blonde Frankenstein wig Tuesday night for the “2011 Christie’s for the Green Auction: A Bid to Save the Earth” event.

Before the show, she revealed via twitter that it was Vogue Editor Anna Wintour that invited her to the event:

“Dear Barbz, Who knew [when] I gave Anna Wintour a [shout out] in “Muny” she’d be calling me [to] perform @ a Vogue Charity event. Lmao. Headed there now” (Nicki Minaj Twitter)

See more images of Nicki Minaj performance below.

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